COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

In a high pressure compressor, the delivery pressure is

8 to 10 bar

1 to 5 bar

5 to 8 bar

10 to 15 bar

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A compressor at high altitudes will require ___ power.

Same

More

Less

None of the listed here

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A closed cycle gas turbine works on

Carnot cycle

Rankine cycle

Ericsson cycle

Joule cycle

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The overall efficiency of the compressed air system is the

Product of shaft output of air motor and shaft input to the compressor

None of these

Ratio of shaft output of the air motor to the shaft input to the compressor

Ratio of shaft input to the compressor to the shaft output of air motor

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If the flow of air through the compressor is parallel to its axis, then the compressor is

Centrifugal compressor

Turbo compressor

Reciprocating compressor

Axial flow compressor

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A rocket works with maximum overall efficiency when air craft velocity is equal to the

Jet velocity

Half the jet velocity

Twice the jet velocity

Average of the jet velocity

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The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation

0.5%

5%

1.0%

0.1%

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The minimum work required for a three stage reciprocating air compressor is ___ the work required for each stage.

Equal to

Double

Three times

Six times

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The pressure ratio in gas turbines is of the order of

0.16736111111111

0.084027777777778

2.5423611111111

0.37569444444444

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The air power of the compressor is also known as

Frictional power

Indicated power

None of these

Brake power

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